near-infrared radiation


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near-infrared radiation

[′nir ‚in·frə′red ‚rād·ē′ā·shən]
(electromagnetism)
Infrared radiation having a relatively short wavelength, between 0.75 and about 2.5 micrometers (some scientists place the upper limit from 1.5 to 3 micrometers), at which radiation can be detected by photoelectric cells, and which corresponds in frequency range to the lower electronic energy levels of molecules and semiconductors. Also known as photoelectric infrared radiation.
References in periodicals archive ?
One layer of semiconductors--a mixture of mercury, cadmium, and telluride--records the near-infrared radiation, while a layer of silicon bonded to this material reads out the electronic signals.
As recently as a decade ago, no one envisioned detecting near-infrared radiation from the face of Venus, To reach an orbiting telescope, for example, heat radiated from the surface must pass through dense layers of carbon dioxide - a gas that absorbs most nearinfrared light.
Because the Ch-LCD reflects near-infrared radiation as well as (multi-color) visible light, the display can even be read in star light conditions using night vision goggles.
They made their estimate by comparing X-ray emissions from the galaxy's core with their own observations of dust-obscured, near-infrared radiation.